About ADHD Test Online
Free, confidential ADHD screening using WHO-validated ASRS and SNAP-IV assessments. Evidence-based tools trusted by clinicians worldwide.
Last reviewed: December 2024
Our Mission
ADHD affects millions of adults and children worldwide, yet many remain undiagnosed. Our mission is to provide free, accessible ADHD screening using the same validated tools that healthcare professionals use. We believe everyone deserves to understand their symptoms and access appropriate support.
Clinical Research Foundation
Our screening tools are developed by world-leading ADHD researchers and endorsed by the World Health Organization
The ASRS (Adult ADHD Self-Report Scale) used on this platform was developed by the World Health Organization in collaboration with leading ADHD researchers. It is one of the most widely validated ADHD screening instruments in the world.
Dr. Ronald C. Kessler
Professor of Health Care Policy
Harvard Medical School
Lead developer of the WHO Adult ADHD Self-Report Scale (ASRS). Pioneer in epidemiological research on mental health disorders.
Key Publication:
Kessler, R. C., et al. (2005). The World Health Organization Adult ADHD Self-Report Scale (ASRS): a short screening scale for use in the general population. Psychological Medicine, 35(2), 245-256.
View on PubMedDr. Lenard Adler
Professor of Psychiatry and Child & Adolescent Psychiatry
NYU School of Medicine
Co-developer of the ASRS, leading expert in adult ADHD diagnosis and treatment. Director of the NYU Adult ADHD Program.
Key Publication:
Adler, L. A., et al. (2006). Validity of pilot Adult ADHD Self-Report Scale (ASRS) to rate adult ADHD symptoms. Annals of Clinical Psychiatry, 18(3), 145-148.
View on PubMedDr. Thomas Spencer
Associate Professor of Psychiatry
Harvard Medical School
Co-developer of the ASRS and expert in ADHD pharmacotherapy. Extensive research on ADHD across the lifespan.
Key Publication:
Spencer, T., et al. (2007). Further evidence of dopamine transporter dysregulation in ADHD: a controlled PET imaging study using altropane. Biological Psychiatry, 62(9), 1059-1061.
View on PubMedNote: These researchers developed the original ASRS screening instrument for the World Health Organization. Our platform provides a digital implementation of their publicly available screening tool for educational purposes.
World Health Organization Partnership
The ASRS was developed as part of the WHO World Mental Health Survey Initiative. It has been translated into over 20 languages and validated in populations across the globe. The WHO has made this tool freely available to improve ADHD awareness and access to care worldwide.
- Developed by WHO in collaboration with Harvard Medical School
- Validated across multiple countries and cultures
- Used in clinical settings and epidemiological research
- Freely available from WHO for educational purposes
Our Approach
We prioritize clinical validity, privacy, and accessibility:
WHO-Validated Tools
We use the Adult ADHD Self-Report Scale (ASRS) developed by the World Health Organization and the SNAP-IV for children—the same tools used by psychiatrists and psychologists worldwide.
Learn about our assessmentsComplete Privacy
Your responses are processed entirely in your browser. Nothing is stored on servers, no accounts are created, and we never track or sell your data. Your screening is completely confidential.
Read our privacy policyDSM-5 Aligned
Our assessments align with the current Diagnostic and Statistical Manual (DSM-5) criteria for ADHD, ensuring clinical relevance and accuracy.
Comprehensive Resources
Beyond screening, we provide evidence-based information about ADHD symptoms, treatment options, and how to find professional support.
Explore ADHD resourcesContent Standards
We maintain rigorous standards for all content:
- All assessments are based on WHO-validated instruments
- Educational content follows DSM-5 and ICD-11 diagnostic criteria
- Information is sourced from NIMH, CDC, and peer-reviewed research
- Content is regularly updated to reflect current clinical guidelines
- Clear distinction between screening and diagnosis is maintained
Our Commitment
We are committed to providing accurate, helpful, and judgment-free information about ADHD. We recognize that ADHD is a neurodevelopmental difference that affects people across all ages, backgrounds, and professions. Our goal is to help people understand their symptoms and connect with appropriate professional care.
Professional & Research Resources
For more information about ADHD research and professional support:
World Health Organization - ADHD
Official WHO resources and the original ASRS screening tool
National Institute of Mental Health (NIMH)
Comprehensive ADHD information from the US government
CHADD - Children and Adults with ADHD
Leading nonprofit providing ADHD education and advocacy
ADHD Foundation
UK-based organization providing ADHD support and resources
Ready to Understand Your Symptoms?
Take a free, confidential screening based on WHO-validated assessment tools
Start Free ADHD ScreeningImportant Disclaimer
Our screening tools are for educational purposes only. They cannot diagnose ADHD—only a qualified healthcare professional can do that after a comprehensive evaluation. If you or your child are experiencing symptoms that interfere with daily life, please consult with a psychiatrist, psychologist, or other qualified provider.